Bowles, P.M.; Molloy, J.B.; Blight, G.W.; Singh, S.; Mabikacheche, L.G.(Published by the Agricultural Research Council, Onderstepoort Veterinary Institute ., 2000)
Williams, R.; Schoeman, M.; Van Wyk, A.; Roos, K.; Josemans, E.J.(Published by the Agricultural Research Council, Onderstepoort Veterinary Institute, 1997)
Sahle, M.; Burgess, G.W.(Published jointly by the Agricultural Research Council, ARC-Onderstepoort Veterinary Institute and the Faculty of Veterinary Science, University of Pretoria., 2002)